Bump version number to 1.5.0

Release 1.4.0

Bump version to 1.3.1

bump version

Update to complete version string

Add typing annotations (#72)

* Add typing annotations

* Update CI

* Pymake issue is not yet fixed in the latest release

* Sort imports

* Use typing syntax that is compatible with <3.10

* Extend typing

* CI: Ignore missing imports

* Fix types

* Add type annotation

* Ignore last type errors

* Install types before running mypy

* Finish up CI

* Export types

* Add more annotations

* Add more types

Setting the version for the first release